• [Wiki] http://en.wikipedia.org/wiki/Empidonax_traillii.
• [AnAge] http://genomics.senescence.info/species/entry.php?species=Empidonax_traillii.
• [King1955] King, J. R. (1955). Notes on the life history of Traill's flycatcher (Empidonax traillii) in Southeastern Washington. The Auk, 72(2):148--173.
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